Granules, method for their production, and method for producing glass product
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
C03C-003/087
C03B-001/02
C03C-001/02
C03C-003/091
C04B-018/02
출원번호
US-0054478
(2016-02-26)
등록번호
US-10035726
(2018-07-31)
우선권정보
JP-2013-184369 (2013-09-05)
발명자
/ 주소
Ando, Ryota
Nishina, Noriko
출원인 / 주소
Asahi Glass Company, Limited
대리인 / 주소
Oblon, McClelland, Maier & Neustadt, L.L.P.
인용정보
피인용 횟수 :
0인용 특허 :
2
초록▼
To provide a method for producing granules as glass raw material without using a binder that contains an alkali metal or boron. In the method, granules are produced by mixing a glass raw material composition and water. A method for producing granules to be used for the production of alkali-free glas
To provide a method for producing granules as glass raw material without using a binder that contains an alkali metal or boron. In the method, granules are produced by mixing a glass raw material composition and water. A method for producing granules to be used for the production of alkali-free glass, which comprises mixing a glass raw material composition and water, wherein the glass raw material composition essentially comprises an aluminum source containing calcium aluminate represented by CaO.2Al2O3, a calcium source containing one or both of calcium oxide and calcium hydroxide, and a silicon source.
대표청구항▼
1. A method for producing granules to be used for the production of alkali-free glass, the method comprising: mixing a glass raw material composition and water, wherein the glass raw material composition comprises: calcium oxide and/or calcium hydroxide,CaO.2Al2O3, anda silicon source. 2. The method
1. A method for producing granules to be used for the production of alkali-free glass, the method comprising: mixing a glass raw material composition and water, wherein the glass raw material composition comprises: calcium oxide and/or calcium hydroxide,CaO.2Al2O3, anda silicon source. 2. The method for producing granules according to claim 1, wherein the glass raw material composition further comprises CaO.Al2O3. 3. The method for producing granules according to claim 1, wherein the glass raw material composition comprises, as a refining agent or a color tone adjuster, a sulfate component and/or a nitrate component. 4. The method for producing granules according to claim 1, wherein the glass raw material composition comprises the CaO.2Al2O3 in alumina cement, the alumina cement having an Al2O3 content of at least 65 mass %. 5. The method for producing granules according to claim 4, wherein the alumina cement comprises a calcium aluminate, the calcium aluminate comprising the CaO.2Al2O3 and CaO.Al2O3 in a total amount of from 80 to 100 mass % based on a total amount of the calcium aluminate in the alumina cement, and wherein the CaO.2Al2O3 is present in the alumina cement in an amount of from 2 to 100 mass % based on the total amount of CaO.2Al2O3and CaO.Al2O3 in the alumina cement. 6. The method for producing granules according to claim 4, further comprising granulating the glass raw material composition by adding the calcium oxide and/or calcium hydroxide and the silicon source to a hydrate of the alumina cement, and mixing. 7. The method for producing granules according to claim 4, wherein the alumina cement having an Al2O3 content of at least 65 mass % consists essentially of the CaO.2Al2O3 and CaO.Al2O3. 8. The method for producing granules according to claim 4, wherein the alumina cement has an Al2O3 content of at least 90 mass % and further comprises CaO.6Al2O3. 9. The method for producing granules according to claim 4, wherein the alumina cement is present in the glass raw material composition in an amount of from 1 to 20 mass %. 10. The method for producing granules according to claim 1, further comprising, while mixing the glass material composition and water, hardening the composition such that granules are obtained at a temperature of at most 800° C. 11. The method for producing granules according to claim 1, wherein a total amount of calcium oxide and calcium hydroxide in the glass raw material composition is from 0.1 to 10 mass %. 12. The method for producing granules according to claim 1, wherein the glass raw material composition comprises boron oxide and/or boric acid in a total amount of from 0 mass % to at most 3 mass %. 13. The method for producing granules according to claim 1, wherein the alkali-free glass comprises from 40 to 85 mass % of SiO2, from 5 to 30 mass % of Al2O3, from 0 to 18 mass % of MgO and from 2 to 40 mass % of CaO. 14. A method for producing a glass product, comprising: obtaining granules by the method as defined in claim 1,heating the granules to obtain a glass melt, andforming and annealing the glass melt to obtain the glass product. 15. The method for producing granules according to claim 1, wherein the glass raw material composition does not contain boron oxide or boric acid.
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이 특허에 인용된 특허 (2)
Ando, Ryota; Shinohara, Nobuhiro, Granules and method for their production, method for producing molten glass, and method for producing glass product.
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